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Finding the Fourth Proportional to 8,987.91, 13,481.91 and 2,747.90

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Solution

The fourth proportional to 8,987.91, 13,481.91 and 2,747.90 is: 4,121.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,987.91 : 13,481.91 = 2,747.90 : x
  2. Step 2: Convert to fraction form
    8,987.91/13,481.91 = 2,747.90/x
  3. Step 3: Cross multiply
    8,987.91x = 13,481.91 × 2,747.90
  4. Step 4: Simplify right side
    8,987.91x = 37,046,940.49
  5. Step 5: Solve for x
    x = 37,046,940.49/8,987.91
  6. Step 6: Final answer
    x = 4,121.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.